Multiply Whole Tens by Whole Tens (523)

Standards

Printable Aids

Teaching Notes

This activity reinforces multiplication using place value strategies. Emphasize how basic facts and powers of ten simplify larger multiplication problems.

Vocabulary

Whole Tens: Numbers like 10, 20, 30, ending in zero.

Product: The result of multiplication.

Common Mistakes

• Forgetting to include all the zeros in the product (e.g., 20x30=60).
• Incorrect basic multiplication facts (e.g., 2x3=5).
• Confusing multiplication with addition of zeros (e.g., 20x30=6000).

Differentiation

Discussion Questions

• How is multiplying 20 x 30 related to multiplying 2 x 3?
• What pattern do you notice in the number of zeros when you multiply whole tens?
• How does understanding place value help you solve these problems?
• Can you think of a real-world situation where you might need to multiply whole tens?

Extension Activities

• Use base-ten blocks.
• Relate to skip counting.
• Practice with larger multiples.

Parent Tip

Ask: 'If 30 people each bring 40 cookies, how many cookies are there?'

Skill Cluster

Number Sense & Operations

Grade Level

3-4

Skills Practiced

Prerequisites

• Multiplication Facts
• Place Value
• Basic Multiplication Facts
• Understanding Place Value (Tens)
• Multiplying by 10

Next Steps

• Multi-Digit Multiplication
• Estimating Products
• Multiplying 2-Digit by 1-Digit Numbers
• Multiplying 2-Digit by 2-Digit Numbers
• Multiplying with Multiples of 100
• Mental Math Multiplication